{"id":4728,"date":"2026-05-25T09:12:07","date_gmt":"2026-05-25T07:12:07","guid":{"rendered":"https:\/\/computershop.eu\/blog\/?p=4721"},"modified":"2026-05-25T09:22:56","modified_gmt":"2026-05-25T07:22:56","slug":"vulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome","status":"publish","type":"post","link":"https:\/\/computershop.eu\/blog\/fr\/vulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome","title":{"rendered":"Vuln\u00e9rabilit\u00e9 Chromium: risque majeur pour les utilisateurs de Chrome"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">Les utilisateurs des navigateurs bas\u00e9s sur Chromium, y compris Chrome, Edge, Brave ou Opera, sont confront\u00e9s \u00e0 un nouveau probl\u00e8me de s\u00e9curit\u00e9 qui soul\u00e8ve de s\u00e9rieuses questions concernant la protection des donn\u00e9es et la s\u00e9curit\u00e9 de la navigation en ligne. Une vuln\u00e9rabilit\u00e9 Chromium r\u00e9cemment remise en lumi\u00e8re pourrait permettre \u00e0 des sites malveillants d&#8217;exploiter le navigateur sans t\u00e9l\u00e9chargements, sans notifications et, dans certains cas, sans aucune interaction de la part de l&#8217;utilisateur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi cette vuln\u00e9rabilit\u00e9 Chromium est-elle si dangereuse?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me affecte le composant&nbsp;<strong>Browser Fetch<\/strong>, une fonctionnalit\u00e9 introduite pour permettre aux navigateurs de continuer les t\u00e9l\u00e9chargements en arri\u00e8re-plan m\u00eame apr\u00e8s la fermeture d&#8217;un onglet. Initialement, l&#8217;objectif \u00e9tait l\u00e9gitime : am\u00e9liorer l&#8217;exp\u00e9rience utilisateur pour les fichiers volumineux ou le contenu multim\u00e9dia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cependant, la chercheuse en cybers\u00e9curit\u00e9 Lyra Rebane a d\u00e9montr\u00e9 que cette fonction peut \u00eatre exploit\u00e9e pour cr\u00e9er des connexions persistantes entre le navigateur et des serveurs externes contr\u00f4l\u00e9s par des attaquants. En pratique, un site apparemment ordinaire peut maintenir des processus actifs en arri\u00e8re-plan et transformer le navigateur en un point d&#8217;acc\u00e8s pour des activit\u00e9s malveillantes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment fonctionne l&#8217;attaque?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tout se d\u00e9roule tr\u00e8s simplement. L&#8217;utilisateur acc\u00e8de \u00e0 un site web apparemment l\u00e9gitime : il peut s&#8217;agir d&#8217;un article, d&#8217;un r\u00e9sultat de moteur de recherche ou m\u00eame d&#8217;une page partag\u00e9e sur les r\u00e9seaux sociaux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En arri\u00e8re-plan, le navigateur \u00e9tablit une connexion persistante qui continue de fonctionner m\u00eame apr\u00e8s avoir quitt\u00e9 la page. Dans certaines impl\u00e9mentations de Chromium, cette connexion peut survivre m\u00eame apr\u00e8s le red\u00e9marrage du navigateur ou de l&#8217;appareil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ainsi, le navigateur compromis peut \u00eatre utilis\u00e9 pour:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>interm\u00e9diation anonyme de trafic (proxy);<\/li>\n\n\n\n<li>participation \u00e0 des attaques DDoS;<\/li>\n\n\n\n<li>redirection de connexions vers d&#8217;autres serveurs;<\/li>\n\n\n\n<li>surveillance d&#8217;activit\u00e9s de navigation limit\u00e9es.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les experts comparent l&#8217;effet \u00e0 un \u00ab mini-botnet \u00bb construit directement dans le navigateur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Une vuln\u00e9rabilit\u00e9 Chromium connue depuis 2022<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Selon les informations publi\u00e9es, la vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 signal\u00e9e \u00e0 Google d\u00e8s 2022. De plus, elle aurait \u00e9t\u00e9 class\u00e9e en interne comme un probl\u00e8me grave, mais la correction n&#8217;a pas encore atteint les utilisateurs, et le code de d\u00e9monstration (proof-of-concept) est entre-temps devenu public.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&#8217;impact est amplifi\u00e9 par le fait que&nbsp;<strong>Chromium est \u00e0 la base de la majorit\u00e9 des navigateurs modernes<\/strong>. Non seulement Google Chrome est affect\u00e9, mais tout l&#8217;\u00e9cosyst\u00e8me construit sur ce projet open-source.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Les navigateurs mentionn\u00e9s comme pouvant \u00eatre affect\u00e9s incluent:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Google Chrome<\/li>\n\n\n\n<li>Microsoft Edge<\/li>\n\n\n\n<li>Brave<\/li>\n\n\n\n<li>Opera<\/li>\n\n\n\n<li>Vivaldi<\/li>\n\n\n\n<li>Arc Browser<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les navigateurs&nbsp;<strong>Firefox<\/strong>&nbsp;et&nbsp;<strong>Safari<\/strong>&nbsp;n&#8217;utilisent pas le m\u00e9canisme Browser Fetch, ils ne sont donc pas vis\u00e9s par ce probl\u00e8me sp\u00e9cifique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment se prot\u00e9ger avant l&#8217;apparition d&#8217;une mise \u00e0 jour?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Actuellement, il n&#8217;existe pas de solution officielle disponible pour tous les utilisateurs, mais quelques mesures pr\u00e9ventives sont recommand\u00e9es :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00c9vitez les sites inconnus<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&#8217;acc\u00e8s \u00e0 des pages douteuses ou \u00e0 des liens provenant de sources non fiables augmente le risque d&#8217;exploitation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Surveillez le comportement du navigateur<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Des fen\u00eatres inattendues li\u00e9es \u00e0 des t\u00e9l\u00e9chargements ou des notifications inhabituelles peuvent \u00eatre des indices d&#8217;un comportement suspect.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mettez \u00e0 jour votre navigateur constamment<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00eame si le correctif n&#8217;est pas encore publi\u00e9, les mises \u00e0 jour r\u00e9guli\u00e8res restent essentielles pour rem\u00e9dier \u00e0 d&#8217;autres vuln\u00e9rabilit\u00e9s critiques.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Utilisez des solutions de s\u00e9curit\u00e9 suppl\u00e9mentaires<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les extensions de protection, les filtres anti-malware et la surveillance du trafic peuvent r\u00e9duire les risques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Impact sur les utilisateurs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cette vuln\u00e9rabilit\u00e9 Chromium souligne une fois de plus l&#8217;importance de la <a href=\"https:\/\/computershop.eu\/blog\/fr\/extension-chrome-compromise-plus-de-1-million-dutilisateurs-affectes\" target=\"_blank\" rel=\"noreferrer noopener\">s\u00e9curit\u00e9 des navigateurs<\/a> modernes. Dans un contexte o\u00f9 la majorit\u00e9 des utilisateurs passent des heures en ligne, le simple acc\u00e8s \u00e0 une page web ne devrait pas repr\u00e9senter un risque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jusqu&#8217;\u00e0 l&#8217;apparition d&#8217;un correctif officiel, la vigilance des utilisateurs reste la m\u00e9thode de protection la plus efficace contre des attaques qui peuvent s&#8217;ex\u00e9cuter presque invisiblement en arri\u00e8re-plan.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Source:&nbsp;<a href=\"https:\/\/www.androidauthority.com\/chromium-browser-vulnerability-3669581\" target=\"_blank\" rel=\"noreferrer noopener\">androidauthority.com<\/a><\/p>\n\t<div class=\"quickshare-container\">\r\n\t<ul class=\"quickshare-genericons monochrome quickshare-effect-expand\">\r\n\t\t<li class=\"quickshare-share\">Share:<\/li> \r\n\t\t<li><a href=\"https:\/\/facebook.com\/sharer.php?u=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome&amp;t=Vuln%C3%A9rabilit%C3%A9+Chromium%3A+risque+majeur+pour+les+utilisateurs+de+Chrome+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Facebook\"><span class=\"quickshare-facebook\">Facebook<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/twitter.com\/intent\/tweet?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome&amp;text=Vuln%C3%A9rabilit%C3%A9+Chromium%3A+risque+majeur+pour+les+utilisateurs+de+Chrome+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Twitter\"><span class=\"quickshare-twitter\">Twitter<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/pinterest.com\/pin\/create\/button\/?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome&amp;media=https%3A%2F%2Fcomputershop.eu%2Fblog%2Fwp-content%2Fuploads%2F2026%2F05%2FChromium-vulnerability-300x169.png&amp;description=Les+utilisateurs+des+navigateurs+bas%C3%A9s+sur+Chromium%2C+y+compris+Chrome%2C+Edge%2C+Brave+ou+Opera%2C+sont+confront%C3%A9s+%C3%A0+un+nouveau+probl%C3%A8me+de+s%C3%A9curit%C3%A9+qui+soul%C3%A8ve+de+s%C3%A9rieuses+questions+concernant+la+protection+des+donn%C3%A9es+et+la+s%C3%A9curit%C3%A9+de+la+navigation+en+ligne.%26hellip%3B\" target=\"_blank\" title=\"Share on Pinterest\"><span class=\"quickshare-pinterest\">Pinterest<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/linkedin.com\/shareArticle?mini=true&amp;url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome&amp;title=Vuln%C3%A9rabilit%C3%A9+Chromium%3A+risque+majeur+pour+les+utilisateurs+de+Chrome&amp;source=Refurbished+Computers+-+ComputerShop.EU&amp;summary=Les+utilisateurs+des+navigateurs+bas%C3%A9s+sur+Chromium%2C+y+compris+Chrome%2C+Edge%2C+Brave+ou+Opera%2C+sont+confront%C3%A9s+%C3%A0+un+nouveau+probl%C3%A8me+de+s%C3%A9curit%C3%A9+qui+soul%C3%A8ve+de+s%C3%A9rieuses+questions+concernant+la+protection+des+donn%C3%A9es+et+la+s%C3%A9curit%C3%A9+de+la+navigation+en+ligne.%26hellip%3B\" title=\"Share on Linkedin\" target=\"_blank\"><span class=\"quickshare-linkedin\">Linkedin<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/plus.google.com\/share?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome\" target=\"_blank\" title=\"Share on Google+\"><span class=\"quickshare-googleplus\">Google+<\/span><\/a><\/li>\t\t\t\t\t\t\t\t<li><a href=\"mailto:?subject=Refurbished+Computers+-+ComputerShop.EU:+Vuln%C3%A9rabilit%C3%A9+Chromium%3A+risque+majeur+pour+les+utilisateurs+de+Chrome&amp;body=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fvulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome\" target=\"_blank\" title=\"Share via Email\"><span class=\"quickshare-email\">Email<\/span><\/a><\/li>\t<\/ul>\r\n\t<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Les utilisateurs des navigateurs bas\u00e9s sur Chromium, y compris Chrome, Edge, Brave ou Opera, sont confront\u00e9s \u00e0 un nouveau probl\u00e8me de s\u00e9curit\u00e9 qui soul\u00e8ve de s\u00e9rieuses questions concernant la protection des donn\u00e9es et la s\u00e9curit\u00e9 de la navigation en ligne. &hellip; <a href=\"https:\/\/computershop.eu\/blog\/fr\/vulnerabilite-chromium-risque-majeur-pour-les-utilisateurs-de-chrome\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4724,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[103],"tags":[6315,17794,17797,8580,8747,17763,17800,13505,9028,4233,17766],"class_list":["post-4728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouvelles","tag-brave-fr","tag-browser-fetch-fr","tag-edge-fr","tag-google-chrome-fr","tag-navigateur-internet","tag-navigateur-vivaldi","tag-opera-fr","tag-securite-du-navigateur","tag-securite-en-ligne","tag-securite-informatique","tag-vulnerabilite-chromium"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Vuln\u00e9rabilit\u00e9 Chromium: risque majeur pour les utilisateurs de Chrome - Refurbished Computers - ComputerShop.EU<\/title>\n<meta name=\"description\" content=\"Une vuln\u00e9rabilit\u00e9 Chromium connue affecte les utilisateurs des navigateurs populaires Chrome, Edge, Brave, Opera et Vivaldi. 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